Finding the Fourth Proportional to 28,865.31, 43,311.73 and 19,994.31

Step by Step Solution

1. Step 1: Write the proportion equation
   28,865.31 : 43,311.73 = 19,994.31 : x
2. Step 2: Convert to fraction form
   28,865.31/43,311.73 = 19,994.31/x
3. Step 3: Cross multiply
   28,865.31x = 43,311.73 × 19,994.31
4. Step 4: Simplify right side
   28,865.31x = 865,988,056.28
5. Step 5: Solve for x
   x = 865,988,056.28/28,865.31
6. Step 6: Final answer
   x = 30,001.00